Luke: You forget, metal can’t hurt me.
Buffy: There’s something you forgot about too. Sunrise! *She throws the stand at the window. Buffy picks up the stake. Luke realises he isn’t burning to ashes. Buffy stakes him* It’s in about nine hours moron! 

Jesse: Ooooh, alright, put me out of my misery. You don’t have the guts. *someone fleeing bumps them and the stake impales him*